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randomb( [seed=seed,] [dimensions] [, /long])
Returns pseudo-random bits in an array with the indicated
dimensions, which must be either an array, or a set of
scalars. If /long is specified, then returns a long array
in which all bits are random. Otherwise, returns a byte array
with each element set pseudo-randomly to 0 or 1.
seed specifies a seed for the random numbers, and must be
non-zero. The same seed generates the same sequence of pseudo-random
numbers every time. Different seeds generate different sequences. If
you specify a seed but no dimensions, then the
seed is set and a scalar 1 is returned.
The random bits are generated using a primitive polynomial modulo 2,
which has a period of 2^31 - 1, or about 2.1e9.
Alias: random(/bits) (if /long is not set)
See also: random, randomn, randomu, Random Arrays